Carhartt and 3M: outworking them all to help keep you safe. Carhartt high-visibility garments use 3M Scotchlite™ Reflective Material that meets strict safety standards to help you be seen. Segmented trim is used on Carhartt high-vis t-shirts for superior breathability, durability, and comfort, as well as on FR t-shirts and sweatshirts. It helps protect you if you’re in harm’s way. 3M and Scotchlite™ are trademarks of 3M, used under license in Canada.